Re: New post

kelly:

inches per second

terry dean

--
"Old Rocketeer's don't die; they just go OOP"


"Kelly" <kellyjones1@xxxxxxxxx> wrote in message news:5qsfajF116t2fU1@xxxxxxxxxxxxxxxxxxxxx
shockwaveriderz wrote:
I would say ramming does maybe 1.2-1.3 g/cc whereas hydraulic presses can do 1.9 g/cc +.

Density affects the burn rate of black powder. The higher the density the lower the burn rate....

burn rate as measured in inches per second, or mass per second?

If it decreased the linear burn rate, but maintained higher mass burn rate (which is possible since the density is greater), then the casing pressure and thrust go up, as density goes up. If it decreased the linear burn rate AND the mass burn rate, then these go down...

Do you know which it is?

Kelly

.

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